$ git clone -n https://gitee.com/ocs-upgrade/fetchmail.git /var/lib/mock/dist-ocs23-build-284664-27555/root/chroot_tmpdir/scmroot/fetchmail
Cloning into '/var/lib/mock/dist-ocs23-build-284664-27555/root/chroot_tmpdir/scmroot/fetchmail'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/fetchmail
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 820d917 Upgrade to version 6.4.39